Senior .NET/C# Developer



Software developers at Excella are consultants and thought leaders with great business and technology skills. We're delivering game changing products and applications for commercial and government clients. Our specialty areas allow you to choose and focus on your primary technical area, while providing the flexibility to move around depending on client need and your desires. We usually code in Ruby, C#, Python, Java, or JavaScript. We love polyglot developers!


  • Deliver (and enable others to deliver) world-class value to our clients, solving the right problems with the right technologies.
  • Lead by example, applying and embodying agile values and principles on and across teams.
  • Support quality development practices and pursue new and better ways to build software.
  • Understand and follow emerging industry developments to appropriately grow our capabilities and teams.
  • Actively participate in improving codebases by performing code reviews, evolving technical roadmaps, facilitating knowledge sharing sessions, and introducing new possibilities
  • Reach outside the mainstream to adopt the best of all communities: agile coaching, emerging paradigms, different ways of thinking about data, open-source practices, etc. 
  • Build your subject-matter expertise by practicing, learning, and sharing what you know.
  • Grow those around you -- particularly coaching and mentoring other developers --while remembering that you can learn as much as you teach.
  • Be a driver for continuous improvement in our .NET practice


We are currently looking for driven, motivated, full stack developers with Agile experience and fantastic technical skills to join our team. We are looking for experienced C# developers with the following qualifications:

  • 4+ years of experience in developing scalable and high-performing web applications.
  • Excellent communication skills with developers, business analysts, and clients.
  • Experience leading a scrum development team in an agile work environment.
  • Proven results in coaching and growing developers of all experience levels.
  • Comfortable in developing applications with or without the help of Visual Studio.
  • Developing and consuming RESTful endpoints using ASP.NET, WebAPI or equivalent frameworks/tools.
  • Committed to code quality through automated testing tools such as NUnit, xUnit.NET, MSTest, SpecFlow, Selenium, SpecFlow, Cypress, etc.
  • Familiarity with SOLID principles
  • Deep commitment to test driven development and maintaining code quality.
  • Experience working with HTML5, CSS3, JavaScript, and some associated CSS/JS frameworks & tools.
  • Experience in managing a production-ready or in-production enterprise application.
  • Design skills with experience in object-oriented methodologies, design patterns, database design, and data modeling.
  • Experience with modern ORMs (NHibernate, Entity Framework, Dapper, or others) -- and an understanding of their potential pitfalls. 
  • 4-year college degree in computer science or engineering is preferred.
  • Bonus
    • GitHub profiles, blogs or presentation materials.
    • Familiarity with .NET Core and its differences from the standard .NET Framework
    • Angular.js, Ember.js, React.js, Backbone.js OR other front end Javascript frameworks
    • Experience with Automated Acceptance Testing (especially ATDD, BDD).
    • Proven experience running production-level applications on Azure or in the Cloud
    • Knowledge of software quality analysis tools such as SonarQube and NDepend.
    • Experience with setting up CI/CD Pipelines such as Jenkins.
    • Knowledge of logging & monitoring systems such as New Relic, Splunk, Seq, the ELK stack, Nagios, or others. 
    • Familiarity with Microservice or Serverless Architecure
    • Proven track record of engaging with internal and external communities to share knowledge & skills. 

If you have a public Github profile, a blog or presentation materials, please let us know when you apply!

About Excella

Excella is a leading provider of Agile software development and data and analytics solutions to clients in the federal, commercial and non-profit sectors. We believe that great work leads to great things –- our experts measure success by the positive impact we make on our clients, community, and colleagues. We are growing fast and need passionate, innovative people who love working with technology and are ready to make an impact.


Here's what you can expect from us:

  • You'll work with great people who love what they do: our team includes published authors, certified trainers, and internationally renowned speakers.
  • We have a "bring your own device" workplace and will share the cost of a new computer of your choice -- Mac or PC. It's up to you.
  • We'll invest in your career by providing 3 days of paid professional development every year, including travel and registration fees to attend classes and conferences, in addition to tuition assistance for degrees and certifications.
  • Starting day one, every employee is bonus eligible and receives 15 days of paid vacation, 6 federal holidays, and 4 floating holidays.
  • You can bike, drive, or metro to work -- our commute reimbursement plan has you covered.
  • You'll have fun! We hold monthly social events all year long, including a summer event for you and your family.

Excella is an equal opportunity/affirmative action employer. All qualified applicants will receive consideration for employment without regard to sex, gender identity, sexual orientation, race, color, religion, national origin, disability, protected veteran status, age, or any other characteristic protected by law.


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